package com.example.springbootdemo09.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;

    @Configuration
/**
 * 告诉浏览器，我允许哪些服务器访问，哪些请求方式访问，是否运行携带请求头
 */
public class GlobalCorsConfig {
        @Bean
        public CorsFilter corsFilter() {
            //1.添加CORS配置信息
            CorsConfiguration config = new CorsConfiguration();
            //2.允许的域,不要写*，否则cookie就无法使用了
            //config.addAllowedOriginPattern("*");
            config.addAllowedOriginPattern("http://127.0.0.1:5500");
            config.addAllowedOriginPattern("http://localhost:5500");
            config.addAllowedOriginPattern("http://127.0.0.1");
            config.addAllowedOriginPattern("http://localhost");

            //3.是否允许发送Cookie信息
            config.setAllowCredentials(true);
            //4.允许的请求方式
            config.addAllowedMethod("OPTIONS");
            config.addAllowedMethod("HEAD");
            config.addAllowedMethod("GET");
            config.addAllowedMethod("PUT");
            config.addAllowedMethod("POST");
            config.addAllowedMethod("DELETE");
            config.addAllowedMethod("PATCH");
            //5.允许的头信息
            config.addAllowedHeader("*");

            //6.添加映射路径，我们拦截一切请求
            UrlBasedCorsConfigurationSource configSource = new
                    UrlBasedCorsConfigurationSource();
            configSource.registerCorsConfiguration("/**", config);
            //7.返回新的CorsFilter.
            return new CorsFilter(configSource);
        }
    }


